/* 后台管理系统样式 */
:root {
    --primary-color: #00d4ff;
    --secondary-color: #0099cc;
    --accent-color: #ff6b35;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --dark-bg: #0a0a0a;
    --darker-bg: #050505;
    --card-bg: rgba(255, 255, 255, 0.05);
    --border-glow: rgba(0, 212, 255, 0.3);
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    --gradient-secondary: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    --gradient-dark: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    --shadow-glow-strong: 0 0 30px rgba(0, 212, 255, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    overflow-x: hidden;
}

/* 侧边栏样式 */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 280px;
    height: 100vh;
    background: var(--darker-bg);
    border-right: 1px solid var(--border-glow);
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-glow);
}

.sidebar-header {
    padding: 2rem;
    border-bottom: 1px solid var(--border-glow);
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
    text-decoration: none;
}
.logo:hover { opacity: .9; }

.logo i {
    margin-right: 10px;
    font-size: 2rem;
}

.admin-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.admin-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.admin-details h4 {
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.admin-details p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.sidebar-menu {
    list-style: none;
    padding: 2rem 0;
    flex: 1;
}

.menu-item { cursor: pointer; user-select: none; }

.menu-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.menu-item:hover,
.menu-item.active {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.menu-item i {
    font-size: 1.2rem;
    width: 20px;
}

.sidebar-footer {
    padding: 2rem;
    border-top: 1px solid var(--border-glow);
}

.logout-btn {
    width: 100%;
    padding: 1rem;
    background: transparent;
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.logout-btn:hover {
    background: var(--danger-color);
    color: var(--text-primary);
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
}

/* 主内容区域 */
.main-content {
    margin-left: 280px;
    min-height: 100vh;
    background: var(--dark-bg);
}

/* 顶部导航栏 */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-glow);
    backdrop-filter: blur(20px);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.menu-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.menu-toggle:hover {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary-color);
}

#page-title {
    font-size: 1.8rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 1rem;
    color: var(--text-secondary);
}

.search-box input {
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glow);
    border-radius: 10px;
    color: var(--text-primary);
    width: 300px;
    transition: all 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.notifications {
    position: relative;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.notifications:hover {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary-color);
}

.notification-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--danger-color);
    color: var(--text-primary);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
}

.user-menu img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.user-menu img:hover {
    box-shadow: var(--shadow-glow);
}

/* 内容区域 */
.content-area {
    padding: 2rem;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 控制台页面 */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border-glow);
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-primary);
    box-shadow: var(--shadow-glow);
}

.stat-info h3 {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.stat-change {
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 5px;
}

.stat-change.positive {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.stat-change.negative {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
}

/* 快速操作 */
.quick-actions {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border-glow);
    backdrop-filter: blur(20px);
    margin-bottom: 3rem;
}

.quick-actions h2 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.5rem;
}

.action-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
}

.action-btn {
    display: grid;
    grid-template-columns: 56px 1fr;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-glow);
    border-radius: 14px;
    color: var(--text-primary);
    cursor: pointer;
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    text-decoration: none;
}

.action-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-strong);
    border-color: var(--primary-color);
}

.action-btn i {
    width: 56px; height: 56px;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: var(--text-primary);
    font-size: 1.4rem;
    box-shadow: var(--shadow-glow);
}

.action-btn span { font-weight: 700; }
.action-btn small { display:block; color: var(--text-secondary); margin-top:.25rem; }

/* 最近活动 */
.recent-activities {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border-glow);
    backdrop-filter: blur(20px);
}

.recent-activities h2 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.5rem;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.activity-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    border-left: 3px solid var(--primary-color);
    transition: all 0.3s ease;
}

.activity-item:hover {
    background: rgba(0, 212, 255, 0.1);
    transform: translateX(5px);
}

.activity-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    flex-shrink: 0;
}

.activity-content h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.activity-content p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.activity-time {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 页面头部 */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-glow);
}

.page-header h2 {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 筛选器 */
.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--card-bg);
    border-radius: 15px;
    border: 1px solid var(--border-glow);
    backdrop-filter: blur(20px);
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.filter-group label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
}

.filter-group select,
.filter-group input {
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glow);
    border-radius: 8px;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.filter-group select:focus,
.filter-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

/* 表格容器 */
.table-container {
    background: var(--card-bg);
    border-radius: 15px;
    border: 1px solid var(--border-glow);
    backdrop-filter: blur(20px);
    overflow: hidden;
}

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}
.data-table thead th,
.data-table tbody td{
  padding: 14px 16px;
  vertical-align: middle;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.data-table thead th{
  font-weight: 700;
  letter-spacing: .5px;
}
.data-table tbody td{
  font-weight: 500;
}
.data-table thead {
    background: rgba(0, 212, 255, 0.1);
}

.data-table th {
    padding: 1.5rem 1rem;
    text-align: left;
    color: var(--text-primary);
    font-weight: 600;
    border-bottom: 1px solid var(--border-glow);
}

.data-table td {
    padding: 1.5rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
}

.data-table tbody tr:hover {
    background: rgba(0, 212, 255, 0.05);
}

/* 状态徽章 */
.status-badge{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width: 96px;
  height: 28px;
  line-height: 28px;
  padding:0 10px;
  border-radius:14px;
  font-weight:700;
  letter-spacing:.5px;
}
.status-badge.in-stock{ background: #0f7; color:#063; }
.status-badge.low-stock{ background: #fb3; color:#732; }
.status-badge.out-of-stock{ background: #f55; color:#fff; }

/* 按钮样式 */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-primary);
    border: 1px solid var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-strong);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-glow);
}

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
}

.modal-content {
    background: var(--darker-bg);
    margin: 5% auto;
    border-radius: 20px;
    width: 90%;
    max-width: 800px;
    position: relative;
    border: 1px solid var(--border-glow);
    box-shadow: var(--shadow-glow-strong);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 2rem 1rem;
    border-bottom: 1px solid var(--border-glow);
}

.modal-header h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 700;
}

.close {
    color: var(--text-secondary);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.close:hover {
    color: var(--danger-color);
}

.modal-body {
    padding: 2rem;
    max-height: 70vh;
    overflow-y: auto;
}

/* 表单样式 */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glow);
    border-radius: 8px;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
    background: rgba(255, 255, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* 跟踪容器 */
.tracking-container {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border-glow);
    backdrop-filter: blur(20px);
}

.tracking-search {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.tracking-search input {
    flex: 1;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glow);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
}

.tracking-search input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

/* 报表网格 */
.reports-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.report-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border-glow);
    backdrop-filter: blur(20px);
}

.report-card h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.chart-container {
    height: 300px;
    position: relative;
}

/* 设置网格 */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.settings-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border-glow);
    backdrop-filter: blur(20px);
}

.settings-card h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.settings-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.setting-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.setting-item label {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.setting-item input,
.setting-item select {
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glow);
    border-radius: 8px;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.setting-item input:focus,
.setting-item select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .menu-toggle {
        display: block;
    }
}

@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .action-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .filters {
        flex-direction: column;
    }
    
    .filter-group {
        width: 100%;
    }
    
    .table-container {
        overflow-x: auto;
    }
    
    .data-table {
        min-width: 800px;
    }
    
    .reports-grid,
    .settings-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* 动画效果 */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideOutRight {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 212, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 通知样式 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 1rem 2rem;
    border-radius: 10px;
    color: var(--text-primary);
    z-index: 10000;
    box-shadow: var(--shadow-glow-strong);
    animation: slideInRight 0.5s ease;
}

.notification.success {
    background: var(--gradient-primary);
}

.notification.error {
    background: var(--gradient-secondary);
}

.notification.info {
    background: var(--gradient-dark);
    border: 1px solid var(--border-glow);
} 

/* 列宽拖拽 */
.data-table thead th { position: relative; }
.col-resizer {
  position: absolute;
  right: 0;
  top: 0;
  height: 100%;
  width: 6px;
  cursor: col-resize;
  user-select: none;
}
.col-resizer:hover { background: rgba(0,212,255,0.25); }